# Illustration Current-carrying wire loop (ring) - magnetic field lines

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Magnetic field lines of a current-carrying, circular loop. The magnetic field $$\class{violet}{B}$$ passes through the loop and returns to the loop in a circle. A north pole forms above the loop and a south pole below.

Since the magnetic field by definition points from the north to the south pole, a magnetic south pole is formed above the conducting ring and a magnetic north pole below.